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Finding the Fourth Proportional to 612,995.46, 845,920.47 and 354,883.32

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Solution

The fourth proportional to 612,995.46, 845,920.47 and 354,883.32 is: 489,731.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,995.46 : 845,920.47 = 354,883.32 : x
  2. Step 2: Convert to fraction form
    612,995.46/845,920.47 = 354,883.32/x
  3. Step 3: Cross multiply
    612,995.46x = 845,920.47 × 354,883.32
  4. Step 4: Simplify right side
    612,995.46x = 300,203,064,849.56
  5. Step 5: Solve for x
    x = 300,203,064,849.56/612,995.46
  6. Step 6: Final answer
    x = 489,731.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.